The assisted reproductive technique where embryos with more than 8 blastomeres are transferred into the human uterus is known as:

IUT

The correct answer is Option (4) → IUT    

Assisted Reproductive Technologies (ART) are medical procedures used to treat infertility by manipulating eggs, sperm, or embryos outside the body. These technologies aim to help individuals or couples achieve pregnancy when natural conception is difficult. Some examples of ART include: In vitro fertilisation (IVF–fertilisation outside the body in almost similar conditions as that in the body) followed by embryo transfer (ET) is one of such methods.

The zygote or early embryos (with upto 8 blastomeres) could then be transferred into the fallopian tube (ZIFT–zygote intra fallopian transfer) and embryos with more than 8 blastomeres, into the uterus (IUT – intra uterine transfer), to complete its further development. Transfer of an ovum collected from a donor into the fallopian tube (GIFT – gamete intra fallopian transfer) of another female who cannot produce one, but can provide suitable environment for fertilisation and further development is another method attempted.